INT R OD U CarOene xlix
and is very generally dispersed over the British Islands from its arrival in May until its departure in

September.

46. CApPRIMULGUS RUFICOLLIS . : : : : : f é ; : : Wolreliine let le

RED-NECKED GoaT-sUCKER.

An inhabitant of Spain, North Africa, and Palestine, which has once appeared in our islands.

Family CY PSELID.

The Swifts have been divided into two subfamilies, Cypseline and Cheturine. They are found both in
the New and the Old World. Two of the Cypseline occur in Britain; and one of the Cheturine having in

a single instance been killed here, it becomes necessary to include it in the list of our avifauna.

Genus CypsEuus.

47. CypsELus apus. : : : E . : ; ; : : : : Vol. II. Pl. II.

Swirt:

Arrives in May and departs southward in August or the early part of September, and is therefore a true

mnigrant.

48. CypsELUS MELBA

: : : s : F : Vole Ee

ALPINE Swit.

A common migrant on the continent of Kurope, particularly in its central and southern parts ; it also

inhabits Africa and India, and is an accidental visitor to Britain.

Genus Cuz#rura.

The members of this genus are generally dispersed over America; nor are they absent from Asia, Africa,
or Australia. They have been divided into several subgenera ;_ that of irundapus has been assigned to the

single species which in a solitary instance has found its way to Britain ; but I retain it under the older term

by which it is more generally known.